Tray-elevator guide



S. OLSON TRAY ELEVATOR GUIDE Original Filed Nov. 27 1920 2 SheetsfSheet l Dec, zo, 1927. 1,653,226

S. OLSON TRAY ELEVATOR GUIDE origihawiled Nov. 27. v1920 2 sheets-sheet 2 Panarea. Dec. 2o, 1927.

UNITED STATESPATENT orrlcs.

SAMUEL OLSON,

OF CHICAGO, ILLINOIS, ASSIGNOR TO SAMUEL OLSON COMPANY, 0I CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TRAY-ELEVATOB GUIDE.

Original application led November 27, 1920, Serial No. 426,775. i Divided Aand thil application led november 1o, 1921s.v serial No. 68,129.

This application is a division of my application Serial No. 426,775H1ed November 27, 1920 upon which Letters Patent No. 1,560,- 720 were issued November 10, 1925. This invention relates to an elevator of the type shown and described in my Patent No. 1,325,857, issued December 23 1919, and its purpose is to provide certaln features of construction for an elevator of that type with a view to reducing the cost o f manufacture without impairing the efficiency .of operation. The novel features are herelnafter described and shown in the drawings and are particularly indicated by the clalms.

In the drawings Figure 1 is a sectional plan view of'an elevator of the type to which this invention relates. y

Figure 2 is an elevation of the same, belng taken partly vin section.

Figure 3 is a fragmental plan view showy ing one of the flights provided with the form of guide follower indicated in Figures l and 2.

Figure 4 is a fragmental plan section showing a modified form-of guide and follower.

. Figure 5 is also a fragmental plan `section showing another modification.

Figure 6 is a fragmental plan section of a further modication of the guide and follower.

Referring first to Figures 1 and 2, it will be noted that this type of elevator consists of two pairs-of chains, 1, mounted for vertical-travel about suitable head wheels, 2, and foot wheels, 3, which are preferably toothed wheels for positive engagement with the chain links; and that said chains are arranged in pairs, the two chains of each pair being connected by flights in the form of angled shaped -members whose vertical arms, 4, are attached to the links of the two chains while their horizontal arms extend toward the opposite pair of chains and in horizontal registration with similar flights for supporting loads such as trays of the type commonly used in restaurants or cafeterias for carrying dishes. Thus each pair of chains, 1, with its attached Hights, constitutes a belt mounted for vertical travel, and for steadying these belts particularly 'space into 'which the at I their load-supporting plies, Figure 1 shows guide lugs, 13, extending beyond the angled shaped members to serve as guide followers engaging between vertically extending guide rails, 9 and 10, laterally adjacent the belts. 1

As indicated in Figure 3, the lugs, 13, are formed as extensions of lugs, 12, which are integral with certain links of the chains, 1, and by which the vertical arms, 4, of the flights are attached to the chains. The guideways for the lugs, 13, are in the form of grooves produced by nesting the angle rails, 10, with the angles, 9, as clearly shown in Figure 1,and the extensions of the lugs, 12, which carry the parts, 13, are olset back from the plane of the Hight arms, 4, so that both of the angle rails, 9 and 10, may also be disposed back of this plane to leave ample clearance for trays entering upon or leaving the load-supporting arms, 5, of the Hights. In the particular arrangement hpwp in Figure 1, a horizontally traveling e t, flights of the elevator for receiving trays therefrom as the Hights descend past the planel of the belt, 7. When the trays are thus handled entirely by mechanical means, it is particularly important to avoid any obstruction in the path of movement, and this is the purpose of placing the guideways back of the planes of the flight arms, 4. The belt, 7, and the elevator may be geared in timed relation as by means of bevel gears shown at 8. In yaddition to the vertical arms, 4, of the flights, the load-carrying spaces between the chains, 1, may present a practically continuous wall by providing plates, 6, secured to the chains between successive Hights. As indicated in Figure 3, the guide lug, 13, may be vertically extended for a considerable distance so as to give stability to the Hight and prevent its horizontal arm, 5, from twisting away from the horizontal plane under the load.

Figure 4 suggests a modified use of the lug, 13, by positioning the chain link so that the lug extends just Hush with the extreme lateral edge of the belt formed by the end of the Hight. The lug, the plane of the Hight arm, 4, provides a single guide rail, 14,

13, being offset from loo may extend for engagement on one side by end, thus saving considerable time in makthe lug, 13, and on the other side by the ing these parts, and particularly if the rear tace of the Hight arm, 4. guide lugs are provided as integral parts of In Figure 5 I have shown another way of the chain, no extra time is required for apsecuring proper guidance for the vertically plying them to the flights. v traveling belts. In this arrangement the I claim chains, 1", are of the pintle type, and the piv- 1.l In combination with the two vertically ots or pintles thereof are formed with extraveling belts, each composed of a pair ot tensions, 16, which may carry antitriction chains mounted for vertical travel with rollers, 15, if desired, to reach into the angle rails horizontally connecting the grooves formed by the nested guide rails, 9 chains ofeach pair, and each disposed with 60 and 10a. If preferred, the extensions, 16, one arm extending vertically and secured to ma. be kept Within the dimensions of the the chains, and with the other arm project-- dig ts themselves, producing a slightly ing horizontally therefrom, guides extendmore compact structure than that shown in ing laterally adjacent one chain of each pair, Figure 1. and means on the chains positioned back of lFigure 6 shows the chain, 1, constructed the vertical arms of said angle rails and exoi ordinary links as in Figure 3. Separate tending laterally to engage said guides. guide followers in the form et short Z-hars, Q. An elevator in combination with a pair 17, areattached to the vertical arms, 4, of ot' vertically traveling chains with transthe ights, independently of the chains and verse load supporting means connecting with their tlanges, 18, extending into the them, a vertically extending guide laterally guideway formed by the nested angle rails, adjacent one of said chains and followers at 19 and 20. This has the advantage of using intervals on said chain extending laterally standard parts for the chains and other therefrom to engage said guide. elements, the -bars being the only special 3. An elevator comprising four chains iittings required. mounted for parallel vertical travel with It will be evidentl that in all the foregoing angle rails connecting them in pairs and structures the necessary guidance is secured horizontally registered with each other for in a more economical way than that sugsupporting loads between the' two pairs of gested by my former Patent No. 1,325,857 chains, together with guide lugs on the links 70 in which one arm of eac-h ot the flights is of said chains and spaced apart more widemade longer than the other arm to provide ly than the angle rails of opposing pairs for uide lugs, and these lugs are offset at one engaging vertical guide rails extending latside of the helt to carry them back of the erally adjacent said chains. plane of the vertical Hight arms so as to In testimony whereof I have hereunto set avoid obstructing the trays.l By making the my hand at New York, this 9th day of Noguide lugs as separate members, it becomes vember, 1925. possible to cut od the tlights squarely at each A SAMUEL OLSON. 

